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    Change detection studies in and around Kolleru Lake using high resolution data

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    PORSEC_Proc_2000_II_690.pdf (632.6Kb)
    Date
    2000
    Author
    Rao, M.V.
    Rao. K.H.
    Ramana, I.V.
    Sasamal, S.K.
    Choudhury, S.B.
    Bhan, S.K.
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    Abstract
    Kolleru is one of the largest freshwater lake situated in Krishna and West Godavari districts of Andhra Pradesh state, India, having an area of 198.92 sq. km. Agriculture was practiced on the lake surrounding areas. During the aqua boom in late eighties and early nineties, the lake underwent phenomenal changes leading to disastrous ecological changes and irreparable damages. If this trend continues the lake may soon disappear. In the present study, an attempt has been made to estimate the area under fish pond culture within the lake area using high resolution data from satellites. The changes that are occurred during the last ten years in Kolleru lake area have been studied. The digital base map covering the lake and surroundings with the administrative boundaries have been prepared. The satellite data from Landsat and IRS have been analysed and classified, after geometric rectification of the images. The area under fish culture in the lake in each mandal has been estimated and presented. It is found that more than 65 per cent of the lake area has been encroached for conversion into fish ponds by 1999. The detailed discussion on the causative factors due to encroachment into the lake area for conversion to fish ponds have been presented. The various action plans to restore the lake area is also discussed in detail.
    URI
    http://drs.nio.org/drs/handle/2264/1664
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